基于FTP4J组件的FTP操作客户端，支持上传、下载，两台FTP服务器文件流同步。
package com.matol.utils
import it.sauronsoftware.ftp4j.FTPClient;
import it.sauronsoftware.ftp4j.FTPDataTransferListener;
import it.sauronsoftware.ftp4j.FTPFile;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
/**
* 基于FTP4J组件的FTP操作客户端
* ww
*/
public final class FTPToolkit {
//单例模型
private FTPToolkit() { }
/**
* 创建FTP连接
* @param host 主机名或IP
* @param port ftp端口
* @param username ftp用户名
* @param password ftp密码
* @return 一个单例客户端
*/
public static FTPClient ftpConn(String host, int port, String username, String password) {
FTPClient client = new FTPClient();
try {
client.connect(host, port);
client.login(username, password);
client.setCharset("GBK");
client.setType(FTPClient.TYPE_BINARY);
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.ftpConn() "+e.getMessage());
}
return client;
}
/**
* 取得目录下所有文件列表
* @param path
* @return
*/
public static List<FTPFile> getlistFiles(FTPClient client,String path) {
List<FTPFile> filesList = new ArrayList<FTPFile>();
try {
client.changeDirectory(path);
FTPFile[] fileNames = client.list(); //.listNames();
if (null != fileNames) {
for (FTPFile file : fileNames) {
if(file.getType() == FTPFile.TYPE_FILE){
filesList.add(file);
//System.out.println(file.getName()+" | "+file.getSize()+" | "+DateUtil.converDateToString(file.getModifiedDate(),DateUtil.defaultDatePattern));
}
}
}
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.getlistFiles()"+ e.getMessage());
}
return filesList;
}
/**
* 取得目录下所有文件列表
* @param path
* @return
*/
public static List<String> getlistFileNames(FTPClient client,String path) {
List<String> filesList = new ArrayList<String>();
try {
client.changeDirectory(path);
String[] fileNames = client.listNames();
if (null != fileNames) {
for (String file : fileNames) {
filesList.add(path+"/"+file);
//System.out.println(path+"/"+file);
}
}
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.getlistFileNames()"+ e.getMessage());
}
return filesList;
}
/**
* 根据文件路径获取文件流
* @param path
* @return
*/
public static InputStream fetchInputStream(FTPClient client,String ftpFilePath,String ftpPath) {
InputStream is = null;
try {
String localFilePath = getFileName("ftptmp/"+ftpFilePath) + "_ftp.tmp";
File tempLocalFile = new File(localFilePath);
if (!tempLocalFile.exists()) {
tempLocalFile.createNewFile();
}
client.download(ftpPath, tempLocalFile);
is = new FileInputStream(tempLocalFile);
//删除临时文件(由于不能关闭文件流，删除临时文件无效,所以最好使用deleteOnExit，外层程序使用文件流结束后，关闭流，自动删除)
//tempLocalFile.deleteOnExit();
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.fetchInputStream()"+e.getMessage());
}
return is;
}
/**
* 上传文件到FTP
* @param ftpFilePath 要上传到FTP的路径
* @param source 源数据
*/
public static void uploadInputStream(FTPClient client,String ftpFilePath, InputStream ftpFile) {
try {
mkDirs(client,ftpFilePath.substring(0, ftpFilePath.lastIndexOf("/")));
client.upload(ftpFilePath, ftpFile, 0l, 0l, null);
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.uploadInputStream()"+e.getMessage());
}finally{
try {
//关闭文件流
ftpFile.close();
} catch (Exception e) {}
}
}
/**
* FTP下载文件到本地一个文件夹,如果本地文件夹不存在，则创建必要的目录结构
* @param client FTP客户端
* @param remoteFileName FTP文件
* @param localFolderPath 存的本地目录
*/
public static void download(FTPClient client, String remoteFileName, String localFolderPath) {
try {
int x = isExist(client, remoteFileName);
MyFtpListener listener = MyFtpListener.instance("download");
File localFolder = new File(localFolderPath);
if (!localFolder.exists()) {
localFolder.mkdirs();
}
if (x == FTPFile.TYPE_FILE) {
String localfilepath = formatPath4File(localFolderPath+File.separator+new File(remoteFileName).getName());
if (listener != null) {
client.download(remoteFileName, new File(localfilepath), listener);
}else{
client.download(remoteFileName, new File(localfilepath));
}
}
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.download()"+e.getMessage());
}
}
//递归创建层级目录（坑爹的问题，原本想着递归处理，后来才发现如此的简单）
private static void mkDirs(FTPClient client,String p) throws Exception {
if (null == p) { return;}
if(p != null && !"".equals(p) && !"/".equals(p)){
String ps = "";
for(int i=0;i<p.split("/").length;i++){
ps += p.split("/")[i]+"/";
if (!isDirExist(client,ps)) {
client.createDirectory(ps);// 创建目录
client.changeDirectory(ps);// 进入创建的目录
System.out.println(">>>>> create directory:["+i+"]["+ps+"]");
}else{
//System.out.println("select directory:["+i+"]["+ps+"]");
}
}
}
}
//检查目录是否存在
private static boolean isDirExist(FTPClient client,String dir) {
try {
client.changeDirectory(dir);
} catch (Exception e) {
return false;
}
return true;
}
/**
* FTP上传本地文件到FTP的一个目录下
* @param client FTP客户端
* @param localfilepath 本地文件路径
* @param remoteFolderPath FTP上传目录
*/
public static void upload(FTPClient client, String localfilepath, String remoteFolderPath) {
try {
mkDirs(client,remoteFolderPath);
File localfile = new File(localfilepath);
upload(client, localfile, remoteFolderPath);
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.upload()"+e.getMessage());
}
}
/**
* FTP上传本地文件到FTP的一个目录下
* @param client FTP客户端
* @param localfile 本地文件
* @param remoteFolderPath FTP上传目录
*/
public static void upload(FTPClient client, File localfile, String remoteFolderPath) {
remoteFolderPath = formatPath4FTP(remoteFolderPath);
MyFtpListener listener = MyFtpListener.instance("upload");
try {
client.changeDirectory(remoteFolderPath);
if (listener != null) {
client.upload(localfile, listener);
}else{
client.upload(localfile);
}
client.changeDirectory("/");
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.upload()"+e.getMessage());
}
}
/**
* 批量上传本地文件到FTP指定目录上
* @param client FTP客户端
* @param localFilePaths 本地文件路径列表
* @param remoteFolderPath FTP上传目录
*/
public static void uploadListPath(FTPClient client, List<String> localFilePaths, String remoteFolderPath) {
try {
remoteFolderPath = formatPath4FTP(remoteFolderPath);
client.changeDirectory(remoteFolderPath);
MyFtpListener listener = MyFtpListener.instance("uploadListPath");
for (String path : localFilePaths) {
File file = new File(path);
if (listener != null) {
client.upload(file, listener);
}else {
client.upload(file);
}
}
client.changeDirectory("/");
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.uploadListPath()"+e.getMessage());
}
}
/**
* 批量上传本地文件到FTP指定目录上
* @param client FTP客户端
* @param localFiles 本地文件列表
* @param remoteFolderPath FTP上传目录
*/
public static void uploadListFile(FTPClient client, List<File> localFiles, String remoteFolderPath) {
try {
client.changeDirectory(remoteFolderPath);
remoteFolderPath = formatPath4FTP(remoteFolderPath);
MyFtpListener listener = MyFtpListener.instance("uploadListFile");
for (File file : localFiles) {
if (listener != null){
client.upload(file, listener);
}else{
client.upload(file);
}
}
client.changeDirectory("/");
} catch (Exception e) {
System.out.println("###[Error] FTPToolkit.uploadListFile() "+e.getMessage());
}
}
/**
* 判断一个FTP路径是否存在，如果存在返回类型(FTPFile.TYPE_DIRECTORY=1、FTPFile.TYPE_FILE=0、FTPFile.TYPE_LINK=2)
* @param client FTP客户端
* @param remotePath FTP文件或文件夹路径
* @return 存在时候返回类型值(文件0，文件夹1，连接2)，不存在则返回-1
*/
public static int isExist(FTPClient client, String remotePath) {
int x = -1;
try {
remotePath = formatPath4FTP(remotePath);
FTPFile[] list = client.list(remotePath);
if (list.length > 1){
x = 1;
}else if (list.length == 1) {
FTPFile f = list[0];
if (f.getType() == FTPFile.TYPE_DIRECTORY) {
x = 1;
}
//假设推理判断
String _path = remotePath + "/" + f.getName();
if(client.list(_path).length == 1){
x = 1;
}else{
x = 0;
}
} else {
client.changeDirectory(remotePath);
x = 1;
}
} catch (Exception e) {
x = -1;
System.out.println("###[Error] FTPToolkit.isExist() "+e.getMessage());
}
return x;
}
/**
* 关闭FTP连接，关闭时候像服务器发送一条关闭命令
* @param client FTP客户端
* @return 关闭成功，或者链接已断开，或者链接为null时候返回true，通过两次关闭都失败时候返回false
*/
public static boolean closeConn(FTPClient client) {
if (client == null) return true;
if (client.isConnected()) {
try {
client.disconnect(true);
return true;
} catch (Exception e) {
try {
client.disconnect(false);
} catch (Exception e1) {}
}
}
return true;
}
//###---------------------------------------------------------------------
/**
* 格式化文件路径，将其中不规范的分隔转换为标准的分隔符,并且去掉末尾的文件路径分隔符。
* 本方法操作系统自适应
* @param path 文件路径
* @return 格式化后的文件路径
*/
public static String formatPath4File(String path) {
String reg0 = "////+";
String reg = "////+|/+";
String temp = path.trim().replaceAll(reg0, "/");
temp = temp.replaceAll(reg, "/");
if (temp.length() > 1 && temp.endsWith("/")) {
temp = temp.substring(0, temp.length() - 1);
}
temp = temp.replace('/', File.separatorChar);
return temp;
}
/**
* 格式化文件路径，将其中不规范的分隔转换为标准的分隔符
* 并且去掉末尾的"/"符号(适用于FTP远程文件路径或者Web资源的相对路径)。
* @param path 文件路径
* @return 格式化后的文件路径
*/
public static String formatPath4FTP(String path) {
String reg0 = "////+";
String reg = "////+|/+";
String temp = path.trim().replaceAll(reg0, "/");
temp = temp.replaceAll(reg, "/");
if (temp.length() > 1 && temp.endsWith("/")) {
temp = temp.substring(0, temp.length() - 1);
}
return temp;
}
/**
* 获取FTP路径的父路径，但不对路径有效性做检查
* @param path FTP路径
* @return 父路径，如果没有父路径，则返回null
*/
public static String genParentPath4FTP(String path) {
String f = new File(path).getParent();
if (f == null) {
return null;
}else {
return formatPath4FTP(f);
}
}
//###---------------------------------------------------------------------
//获取指定目录下的文件
public static File[] getPathFiles(String path){
File file = new File(path);
if (file.isDirectory()) {
File[] files = file.listFiles();
return files;
}
return null;
}
//删除指定目录下的临时文件
public static void deleteFiles(String path){
File file = new File(path);
if (file.isDirectory()) {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
//String name = files[i].getName();
//if(name.trim().toLowerCase().endsWith("_ftp.tmp")) {
//System.out.println(name + "/t");
//}
//清空临时文件 _ftp.tmp
files[i].delete();
}
}
}
//截取文件名称
public static String getFileName(String fileName){
String fs = "F"+System.currentTimeMillis();
try {
if(fileName != null && !"".equals(fileName)){
if(fileName.lastIndexOf("/") > 0 && fileName.lastIndexOf(".") > 0){
fs = fileName.substring(fileName.lastIndexOf("/")+1);
}else{
fs = fileName;
}
if(fs.length() >50){
fs = fs.substring(0,50);
}
return fs;
}else{
return fs;
}
} catch (Exception e) {
System.out.println("###[Error] FtpTools.getFileName()"+e.getMessage());
}
return fs;
}
public static void main(String args[]) throws Exception {
FTPClient f41 = FTPToolkit.ftpConn("129.2.8.31", 21, "root", "root31");
FTPClient f42 = FTPToolkit.ftpConn("129.2.8.32", 21, "root", "root32");
//InputStream in = FTPToolkit.fetchInputStream(f41,"/home/photofile/wenzi-003.jpg");
//FTPToolkit.uploadInputStream(f41,"/home/photofile/aa.jpg",in);
//FTPToolkit.upload(f41, "E://demo//av1.jpg", "/home/photofile/10/20");
//FTPToolkit.download(f41, "/home/photofile/wenzi-100.jpg", "E://");
//FTPToolkit.getlistFiles(f41,"/home/photofile");
//文件流对流读取操作
List<String> ls = null;//FTPToolkit.getlistFileNames(f41,"/home/photofile");
if(ls != null && ls.size() >0){
InputStream in=null;
for(int i =0;i<ls.size();i++){
//in = FTPToolkit.fetchInputStream(f41,ls.get(i));
if(in != null && in.available() > 0){
FTPToolkit.uploadInputStream(f42,"/home/wasadmin/photoSysTempFTP/"+getFileName(ls.get(i)),in);
f41.deleteFile(ls.get(i));
}
}
//清空项目下的临时文件
FTPToolkit.deleteFiles("ftptmp");
}
FTPToolkit.closeConn(f41);
FTPToolkit.closeConn(f42);
}
}
/**
* FTP监听器
*/
class MyFtpListener implements FTPDataTransferListener {
private String tag;
private MyFtpListener(String tags) {
this.tag = tags;
}
public static MyFtpListener instance(String tags) {
return new MyFtpListener(tags);
}
public void started() {
//System.out.println(tag+ "：FTP启动。。。。。。");
}
public void transferred(int length) {
//System.out.println(tag+ "：FTP传输["+length+"]。。。。。。");
}
public void completed() {
//System.out.println(tag+ "：FTP完成。。。。。。");
}
public void aborted() {
//System.out.println(tag+ "：FTP中止。。。。。。");
}
public void failed() {
//System.out.println(tag+ "：FTP挂掉。。。。。。");
}
}
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/10304.html